US4098861A - Wire coating using a liquid polymer - Google Patents

Wire coating using a liquid polymer Download PDF

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Publication number
US4098861A
US4098861A US05/728,345 US72834576A US4098861A US 4098861 A US4098861 A US 4098861A US 72834576 A US72834576 A US 72834576A US 4098861 A US4098861 A US 4098861A
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United States
Prior art keywords
components
mandrel
wire
barrel
mixing chamber
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Expired - Lifetime
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US05/728,345
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English (en)
Inventor
Giovanni Bassani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dow Silicones Corp
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Dow Corning Corp
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Filing date
Publication date
Application filed by Dow Corning Corp filed Critical Dow Corning Corp
Priority to US05/728,345 priority Critical patent/US4098861A/en
Priority to CA284,371A priority patent/CA1109625A/en
Priority to AU28134/77A priority patent/AU516669B2/en
Priority to IT27915/77A priority patent/IT1087530B/it
Priority to FR7729151A priority patent/FR2366120A1/fr
Priority to GB40359/77A priority patent/GB1592693A/en
Priority to JP52116173A priority patent/JPS5830815B2/ja
Priority to BR7706517A priority patent/BR7706517A/pt
Priority to SE7710985A priority patent/SE423508B/xx
Priority to DE2744186A priority patent/DE2744186C3/de
Priority to US05/884,932 priority patent/US4189290A/en
Application granted granted Critical
Publication of US4098861A publication Critical patent/US4098861A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/05—Filamentary, e.g. strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/06—Rod-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/10—Thermosetting resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2301/00—Use of unspecified macromolecular compounds as reinforcement
    • B29K2301/10—Thermosetting resins

Definitions

  • the present invention relates to extrusion or wire coating processes and equipment and, more specifically, to such processes and equipment capable of employing the newly developed, low viscosity multicomponent polymer systems often termed "liquid polymers.”
  • thermoplastic polymer resins which, even when melted, are thick viscous materials. These resins are typically in solid pellet form as they are fed into the extruder or wire coater. Once in the equipment the pellets are heated, melted and extruded in the desired shape and then quenched to the solid state. However, at no point in the process is the viscosity of these materials very low. As a result, considerable energy and time are required to form these resins into the desired shape.
  • liquid polymer low viscosity or "liquid polymer” formulations. Such formations have been suggested for both organic and inorganic (e.g., silicone) polymers.
  • liquid polymer will be used to designate those polymers in which two or more reactive liquid ingredients, having relatively low viscosities, are blended to form a rapidly reacting mixture which cures to form a solid crosslinked polymer.
  • the low viscosity liquid components which eventually react to form the desired product, are preheated and pumped into the extruder under pressure and this initial pressure is the primary force which mixes the components and which carries them through the extruder.
  • the subject extruder is able to process the polymers several times faster than conventional processes and one feature that contributes to this increased speed is that the extruder does not depend on a conventional rotating screw to transport or mix the components.
  • the low viscosity liquid components, which eventually react to form the desired polymer coating are preheated and pumped into the subject wire coater under pressure and this initial pressure is the primary force which mixes and carries the components through the subject wire coater.
  • the subject coating has a lower incidence of pin hole defects than coatings produced by processes employing conventional polymer resins.
  • these and other objects are accomplished by heating and pumping the components of a liquid polymer into a wire coater having a die which is held in a barrel which has a tapered bore in fluid communication with the die opening.
  • the barrel is mounted on a supporting base member.
  • a mandrel having a tapered end is positioned inside the barrel with the tapered end pointed toward the die; preferably the mandrel is rotated during the wire coating operation.
  • the inner surface of the barrel and the mandrel's surface form a mixing chamber through which the liquid polymer components pass, hot and under pressure, and in which they are thoroughly mixed to form a rapidly reacting mixture as they are forced through the coater.
  • either the mandrel's surface in the mixing chamber or the inner surface of the barrel or both may be equipped with mixing blades or fins.
  • the individual "liquid polymer” components are channeled into the mixing chamber, under pressure, through toroidal distribution rings which are positioned on the mandrel at a point so that as soon as the separate components leave the rings, they enter the mixing chamber.
  • Each distribution ring receives one component which is preheated and under pressure through separate inlet ports in the barrel.
  • This invention will provide the wire and cable industry with a process which will operate several times faster than the presently used processes and will consume considerably less energy.
  • the use of the subject process will substantially reduce the frequency of pin hole defects since the viscosity of the subject coating material, as it goes on the wire, will be lower than the viscosity of the thermoplastic resins at this point.
  • the subject invention will also provide a high speed process that produces a coating which is stronger, more dimensionally stable and more solvent resistant than the prior art processes. Many of these advantages are attributable in part to the nature of the coating provided by the subject process.
  • liquid polymer is a term of art and is used to designate a thermosetting polymer formed by a rapid chemical reaction.
  • the liquid reactive components (hereinafter “components") which react to form the polymeric product have relatively low viscosity and are typically stored separately to ensure stability and a reasonable shelf life.
  • inhibitors may be used to allow the reactants to be mixed and form a storage-stable one component precursor which when heated rapidly reacts to form the desired thermoset polymer.
  • FIG. 1 is an elevated cut-away perspective view of the subject wire coater
  • FIG. 2 is an elevated cut-away perspective view of a distribution ring which uniformly feeds one component into the mixing chamber;
  • FIG. 3 is a representative view of the subject wire coater and its auxiliary equipment which includes a pump 3 and a heater 5 for each component.
  • the "liquid polymer” has two low viscosity components. Both contain an organosilicone prepolymer having an aliphatically unsaturated pendent group, typically a vinyl group; examples of this prepolymer are described in U.S. Pat. Nos. 2,823,218; 3,419,593 and 3,697,473.
  • This prepolymer is typically a polysiloxane oligomer.
  • This first component also contains a platinum catalyst such as chloroplatinic acid.
  • the second component also contains the prepolymer and, in addition, a crosslinking agent which is an organosilicon compound having at least two hydrogen atoms linked to a silicon atom per molecule. This crosslinking agent is often referred to as an SiH containing reactant since the SiH bond is the reactive moiety.
  • thermosetting i.e., crosslinked
  • polysiloxane elastomer This reaction is the SiH addition across the carbon-carbon double bond.
  • the organosilicon prepolymer is a linear dimethylsiloxane oligomer having occasional methyl groups in terminal or pendent positions replaced by vinyl groups.
  • the SiH compound is a linear dimethylsiloxane oligomer having occasional pendent methyl groups replaced by hydrogen.
  • the number of hydrogen groups in the SiH compound and the number of vinyl groups in the prepolymer are adjusted so that the SiH to SiVi ratio is within the range of from 1 to 2 and preferably from about 1.3 to 1.6. The optimum SiH to SiVi ratio will depend on the particular compounds used; however, the SiH group should always be in excess.
  • the catalyst is present in an amount ranging from 1 to 100 parts per million (ppm) platinum based on the total composition.
  • the components are individually preheated to a temperature in the range of from about 80° C. to about 200° C. and introduced into the subject wire coater 10, under a pressure in the range of from about 200 psi to about 3500 psi through inlet ports 12 and 14 (see FIG. 1).
  • the rate of cure must be closely correlated with the resin throughput rate of the process since the resin must be cured to a substantially self-sustaining state as it leaves the die. If the resin cures too quickly the coater 10 will be plugged, while, on the other hand, if the resin cures too slowly, the coating on the wire as it emerges from the wire coater 10 will not maintain a uniform thickness.
  • the temperature of the reacting mixture of the "liquid polymer" components, the catalyst concentration and the concentration of the reacting functionalities are preferably adjusted to provide a cure time of about one second. Then, the pressure under which the ingredients enter the wire coater can then be adjusted to provide a residence time of the reacting mixture in the wire coater 10 of from about 0.1 to about 0.4 of the curing time of the mixture at the given pressure.
  • thermosetting i.e., crosslinked polysiloxane wire coating
  • this invention may also be used to apply a coating of other thermosetting "liquid polymer" systems.
  • the prepolymers, precursors, or ingredients of preferable candidate systems should have viscosities, and cure times similar to those of the preferred polysiloxane systems. Suitable examples would include the polyurethane liquid polymers which have received so much interest from the injection molders and the polysulfide liquid polymer which has been developed and marketed by the Thiokol Corporation.
  • the polyurethane systems typically involve the amine catalyzed reaction of an isocyanate (NCO) functionality with a hydroxyl (OH) functionality.
  • NCO isocyanate
  • OH hydroxyl
  • the NCO containing compound is typically toluene diisocyanate and the hydroxyl containing compound is typically a polyoxyalkylene polyol.
  • the polysulfide reaction typically involves the peroxide catalyzed reaction of an SH endcapped polyoxyalkylene with either another SH or a point of ethylenic unsaturation.
  • important factors would include the viscosity of the individual components at a suitable reaction temperature and the cure time once the components are mixed at that temperature.
  • the subject wire coater 10 comprises a barrel 26 which is mounted on a supporting base member (not shown).
  • a mandrel 20 is rotatably mounted on said base member and disposed in the barrel 26.
  • the mandrel has a tapered end 25 which tapers towards a die 16 which is attached to and held in place by the barrel 26.
  • the wire 36 passes through a longitudinal axial channel in the mandrel 20 and is coated as it emerges from the mandrel 20.
  • the heated liquid reactive components enter the wire coater 10, through inlet ports 12 and 14, pass through distribution rings 18 and 19, are blended in mixing chamber 23 and then applied to wire 36.
  • the curing reaction reaches a point such that the coating on the wire is in a substantially self-sustaining state as it emerges from die 16; the curing reaction then continues until a crosslinked elastomer is formed.
  • the tubular product is extruded vertically upwards because the take-up equipment which receives the product from the extruder may be adjusted to minimize the stress on the semi-cured extrudate as it emerges from the die 16.
  • the inlet ports 12 and 14 separately conduct the components to toroidal distribution rings 18 and 19 which uniformly distribute the components around the preferably rotating mandrel 20.
  • the distribution rings are concentric with the mandrel and are placed one behind the other.
  • each distribution ring receives a component from an inlet port and then uniformly distributes the component around the mandrel 20 and directs the flow of the component toward the mixing chamber 23. More specifically, and with reference to FIG. 2 the ingredient flows through an inlet port into an annularly shaped reservoir 40 in the distribution ring 18. Exit ports 42 leading from the annularly shaped reservoir 40 are uniformly spaced around the circumference of the mandrel 20. In FIG. 2 these exit ports 42 are circular, however, their exact shape may be varied considerably as long as they provide a uniform distribution of the component around the circumference of the mandrel 20.
  • the total area of the exit ports 42 is less than the area of the inlet port 12. This will ensure that the inlet port 12 will have the capacity to deliver the component to the annularly shaped reservoir 40, at a volumetric rate which is greater than the volumetric rate at which the exit ports can empty the reservoir 40. This is necessary to ensure that the reservoir will always be full and thereby capable of uniformly delivering the component to all points around the circumference of the mandrel 20.
  • each of the exit ports 42 on the inner surface 44 of the annularly shaped reservoir 40 there is preferably a ridge 41 between each of the exit ports 42 on the inner surface 44 of the annularly shaped reservoir 40.
  • These ridges ensure that there will be no "dead spots” in which small quantities of a component may be held for an extended period of time.
  • Such precautions should be taken in the design of all components which form the flow path of the components and especially in the design of the mixing chamber 23 and all points downstream from that chamber, since once the reactants enter the chamber 23, they are mixed and the curing reaction beings. Any "dead spots" in the flow stream after mixture will collect the reacting mixture and eventually plug the subject wire coater 10.
  • the components Once the components leave the distribution rings 18 and 19, they will enter the preferably conical mixing chamber 23 defined by the inner wall 24 of the barrel 26 and the surface 28 of the mandrel 20. As the components pass through the mixing chamber 23, they are thoroughly mixed and begin to react to form the final cured product. The residence time of the reacting mixture in the mixing chamber is carefully regulated to ensure that the reaction does not proceed to the point that the resin solidifies in the wire coater 10; this would require the disassembly and cleaning of the wire coater 10.
  • the mixing chamber 23 has a plurality of mixing fins 30 attaching to the inner wall 24 of the barrel 26 and second plurality of mixing fins 32 attached to the mandrel 20. It is to be emphasized that the exact configuration of the internal structure of the mixing chamber 23 is not critical to the practice of this invention so long as the mixing chamber 23 is adequate to thoroughly mix the ingredients. In view of this, it is evident that the sets of fins 30 and 32 may be replaced with other mixing configurations such as threads, grooves or simply roughened surfaces.
  • Adequate mixing is a requirement of the subject process since if the reactants are not thoroughly blended the ultimate coating will not be continuous; that is, there will be significant variations in the degree of cure. This is not an acceptable condition.
  • the mandrel 20 is rotated and the speed of rotation may be controlled to ensure adequate mixing.
  • this mixture passes over the tip 34 of mandrel 20 and onto the wire 36 which is moving at a speed of about 1000 meters per minute (mpm) or more.
  • the tip 34 provides a smooth surface over which the reacting mixture flows as it passes from the mixing chamber 23.
  • the tip 34 positions the rapidly moving wire in the center of the die opening 38. This is necessary to ensure that the coating 40 has a uniform thickness.
  • tip 34 may be altered to transform the subject wire coater 10 into an extruder for producing either tubing or solid rod. For example, if the wire were not used and a solid tip were substituted for the hollow tip 34 shown in FIG. 1, the subject wire coater 10 would produce a solid rod. Similarly, if the tip 34 were solid and equipped with a projection which extended through the die, the subject wire coater 10 would extrude a hollow tube.
  • the subject device may be used to produce a rod, a tube or a coated wire; however, the subject device will be most efficient and most productive in producing a coated wire.
  • the wire provides support for the curing extrudate as it emerges from the die. This support reduces the degree of cure of the extrudate necessary to achieve dimensional stability in the final cured product and therefore allows higher production rates.
  • the subject wire coater 10 for a particular application the following calculations will be useful. Initially one must know the dimensions of the coated wire and the estimated speed at which the unit will operate. For purposes of this example a wire having a 1.0 mm diameter will be given a coating 1.5 mm thick. The design speed of the equipment will be 800 meters per minute (i.e., 13.3 meters/second). It is assumed that the specific gravity of the coating material will be about 1.25. Given these conditions the coating on the final product has a linear density of about 15 grams per meter and the flow rate of the coating material is about 195 grams per second.
  • a reasonable cure time of the liquid polymer may be assumed to be about one second.
  • the temperature of the ingredients as they enter the wire coater may be adjusted to provide the assumed cure time.
  • the volume of the mixing chamber should be in the range of from 15 to 45 grams, since this would mean that a given volume of the material would have a residence time in the mixing chamber of from about 10 percent to 20 percent of its total cure time of one second.
  • a three ingredient formulation may be employed by adding one additional inlet port and distribution ring. It will also normally be necessary to add a pump and a heater to supply the third ingredient at the proper temperature and pressure. However, if a third ingredient is added it will be necessary to exercise care to ensure that no two mutually reactive ingredients are in contact for any significant period before they enter the mixing chamber 23.
  • Other modifications will be readily apparent to those skilled in the art in view of this specification. Therefore, the scope of this patent is not to be limited to the specific embodiments which have been described for illustrative purposes but rather by the following claims.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Coating Apparatus (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Processes Specially Adapted For Manufacturing Cables (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
US05/728,345 1976-09-30 1976-09-30 Wire coating using a liquid polymer Expired - Lifetime US4098861A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US05/728,345 US4098861A (en) 1976-09-30 1976-09-30 Wire coating using a liquid polymer
CA284,371A CA1109625A (en) 1976-09-30 1977-08-09 Wire coating using a liquid polymer
AU28134/77A AU516669B2 (en) 1976-09-30 1977-08-23 Wire coating
IT27915/77A IT1087530B (it) 1976-09-30 1977-09-26 Dispositivo per il rivestimento di un conduttore,mediante miscelazione di due o piu' componenti liquidi di reazione
GB40359/77A GB1592693A (en) 1976-09-30 1977-09-28 Wire coating using a liquid polymer
FR7729151A FR2366120A1 (fr) 1976-09-30 1977-09-28 Revetement de fils metalliques au moyen d'un polymere liquide
JP52116173A JPS5830815B2 (ja) 1976-09-30 1977-09-29 ワイヤ−被覆装置
BR7706517A BR7706517A (pt) 1976-09-30 1977-09-29 Revestidor de fios
SE7710985A SE423508B (sv) 1976-09-30 1977-09-30 Tradbeleggare
DE2744186A DE2744186C3 (de) 1976-09-30 1977-09-30 Drahtbeschichtungseinrichtung
US05/884,932 US4189290A (en) 1976-09-30 1978-03-09 Wire coating using a liquid polymer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/728,345 US4098861A (en) 1976-09-30 1976-09-30 Wire coating using a liquid polymer

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/884,932 Division US4189290A (en) 1976-09-30 1978-03-09 Wire coating using a liquid polymer

Publications (1)

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US4098861A true US4098861A (en) 1978-07-04

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US05/728,345 Expired - Lifetime US4098861A (en) 1976-09-30 1976-09-30 Wire coating using a liquid polymer

Country Status (10)

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US (1) US4098861A (de)
JP (1) JPS5830815B2 (de)
AU (1) AU516669B2 (de)
BR (1) BR7706517A (de)
CA (1) CA1109625A (de)
DE (1) DE2744186C3 (de)
FR (1) FR2366120A1 (de)
GB (1) GB1592693A (de)
IT (1) IT1087530B (de)
SE (1) SE423508B (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240777A (en) * 1976-07-05 1980-12-23 Aktiebolaget Skf Feeding and mixing nozzle and method for mixing liquid resin mixtures and feeding it into molds by centrifugal force
US4365946A (en) * 1980-02-01 1982-12-28 Hermann Berstorff Maschinenbau Gmbh Apparatus for continuously processing rubber, elastomers, plastics and like materials which can be vulcanized or cross-linked
US4783289A (en) * 1986-04-01 1988-11-08 Toray Silicone Co., Ltd. Process for molding silicone rubber compositions
US4857250A (en) * 1984-04-13 1989-08-15 Union Carbide Corporation One-extrusion method of making a shaped crosslinkable extruded polymeric product
US4863666A (en) * 1987-05-21 1989-09-05 Wacker-Chemie Gmbh Process for preparing moldings or coatings
US5032073A (en) * 1989-10-06 1991-07-16 Thermax Wire Corp. Thin walled high velocity propagation of foamed thermoplastic resins
US5294461A (en) * 1989-01-30 1994-03-15 Edison Polymer Innovation Corporation Pultrusion process for preparing composites
AT401155B (de) * 1993-06-25 1996-07-25 Unitek Maschnb & Handel Gmbh Querspritzkopf
US5595695A (en) * 1995-05-30 1997-01-21 Sealex Inc. Process for preparing matte finish elastomer
US7658423B1 (en) * 2003-11-25 2010-02-09 Carmichael Daniel T Lifting sling adapted to effectuate cargo security
US7669904B1 (en) * 2003-11-25 2010-03-02 Carmichael Daniel T Lifting sling having a tenacious coating with methods of manufacturing and monitoring the same
EP2384879A1 (de) * 2010-05-04 2011-11-09 Andreas Sausner Verfahren und Vorrichtung zum Umformen von Metallen und Kunststoffen, sowie rohr- oder schlauchförmiges Produkt
DE112009002722B4 (de) * 2008-12-17 2016-12-15 Mitsubishi Electric Corp. Tragseil für einen Aufzug
CN108527838A (zh) * 2017-03-01 2018-09-14 中国科学院宁波材料技术与工程研究所 3d打印耗材拉丝设备
CN111068978A (zh) * 2020-02-11 2020-04-28 义乌市婉聚电子有限公司 一种电缆的表面涂装检测装置

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US4645418A (en) * 1983-09-26 1987-02-24 Farrel Corporation Fluid pump
CA1234719A (en) * 1983-09-26 1988-04-05 Arthur D. Siegel Fluid pump
DK167474B1 (da) * 1983-12-21 1993-11-08 Henkel Kgaa Haarrullelegeme og fremgangsmaade til fremstilling af rullelegemet
GB2229131A (en) * 1989-03-17 1990-09-19 Vactite Ltd Coating electric conductors
GB0006517D0 (en) * 2000-03-18 2000-05-10 French Plc Weighted structures
GB2530113B (en) * 2014-09-12 2017-05-03 Asterope Ltd Wire coating technique
US11023688B1 (en) * 2020-05-27 2021-06-01 Roblox Corporation Generation of text tags from game communication transcripts

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US3689610A (en) * 1968-06-06 1972-09-05 British Insulated Callenders Manufacture of insulated electric cables
US3697473A (en) * 1971-01-04 1972-10-10 Dow Corning Composition curable through si-h and si-ch equals ch2 with improved properties
US3953006A (en) * 1974-02-04 1976-04-27 Thiokol Corporation Portable conversion and dispensing apparatus for curable elastomeric compounds

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3689610A (en) * 1968-06-06 1972-09-05 British Insulated Callenders Manufacture of insulated electric cables
US3697473A (en) * 1971-01-04 1972-10-10 Dow Corning Composition curable through si-h and si-ch equals ch2 with improved properties
US3953006A (en) * 1974-02-04 1976-04-27 Thiokol Corporation Portable conversion and dispensing apparatus for curable elastomeric compounds

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240777A (en) * 1976-07-05 1980-12-23 Aktiebolaget Skf Feeding and mixing nozzle and method for mixing liquid resin mixtures and feeding it into molds by centrifugal force
US4365946A (en) * 1980-02-01 1982-12-28 Hermann Berstorff Maschinenbau Gmbh Apparatus for continuously processing rubber, elastomers, plastics and like materials which can be vulcanized or cross-linked
US4857250A (en) * 1984-04-13 1989-08-15 Union Carbide Corporation One-extrusion method of making a shaped crosslinkable extruded polymeric product
US4783289A (en) * 1986-04-01 1988-11-08 Toray Silicone Co., Ltd. Process for molding silicone rubber compositions
US4863666A (en) * 1987-05-21 1989-09-05 Wacker-Chemie Gmbh Process for preparing moldings or coatings
US5294461A (en) * 1989-01-30 1994-03-15 Edison Polymer Innovation Corporation Pultrusion process for preparing composites
US5032073A (en) * 1989-10-06 1991-07-16 Thermax Wire Corp. Thin walled high velocity propagation of foamed thermoplastic resins
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JPS5343758A (en) 1978-04-20
BR7706517A (pt) 1978-04-18
AU2813477A (en) 1979-03-01
JPS5830815B2 (ja) 1983-07-01
FR2366120A1 (fr) 1978-04-28
CA1109625A (en) 1981-09-29
DE2744186C3 (de) 1979-11-22
GB1592693A (en) 1981-07-08
AU516669B2 (en) 1981-06-18
SE7710985L (sv) 1978-03-31
SE423508B (sv) 1982-05-10
DE2744186B2 (de) 1979-03-22
FR2366120B1 (de) 1980-06-20
DE2744186A1 (de) 1978-04-06
IT1087530B (it) 1985-06-04

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